WAN (Wide Area Network) - A system of LANs: One LAN can be connected to other LANs over any distance via telephone lines and radio waves is called a wide-area network (WAN).
Web portal - A Web site or service that offers a lot of resources and services, such as search engines, e-mail, forums, and on-line shopping malls. By now most of the traditional search engines have transformed themselves into Web portals to attract and keep a larger audience.
Web Site - A place on the Internet or World Wide Web. The term Web site refers to the all encompassing body of information as a whole, for a particular domain name. A place made up of Web pages.
Wildcards - This is used in search query. For example, you type boy* in search query. * is wildcard, and you will get search results with URLs containing all words with refix boy: boy, boys, boyfriend...